Chair for reinforcing-rods for reinforced concrete



- W.B.' LEONARD.

' CHAIR FOR REINFORCING RODS FOR REINFORCED CONCRETE.

, APPLICATION FILED JUNE 26, 1919. -1,343,326.

Patnted June 15, 1920.

5mm 11 toz 6 H0144 may removal of the forms, may be readily re-- 7 WILLIAM 3. LEONARD,

or CHICAGO, ILLINOIS.

CHAIRroR nEINroRoING-noDs ron nnmroncnn CONCRETE.

Application filed June 26,

To all whom it may concern: v

.Be it known that I, WILLIAM B. LEONARD,

a 'citizen of the United States, residing at Chicago, in the county .of Cook and State of Illinois, have invented a new and useful Chair .for Reinforcing-Rods for Reinforced Concrete, of which the following is a specification.

The object of my invention is to prpduce a simple, efficient chair for the metalllc reinforcing bars commonly used in reinforced concrete, the,device being of such character .that it maybe cheaply produced; readily chairs in place, some holding sin le rods and others holding crossing rods; ig. 2 a side elevation showing the chair in final form when holding crossing rods; and Fig. 3 a side elevation, showing the chair when holding a single rod;

The chair is formed from a single piece of wire as follows: An entry tip 10, a stop shoulder 11 substantially at right'anglesto tip 10, a standard 12, a U-shaped seat 13' and an inverted ,leg 14. The seat ,13 is formed, as shown in Fig. 2, by bending the wire back upon itself adjacent standard 12-. The standard 12 is preferably of a height somewhat greater than the height of the upper surface of'the lower reinforcing rods 15, so that the seat 13 is somewhat deeper than the diameter of rod 15. -The inverted leg 14 is of such length that, when the chair is used to support and retain a. second reinforcing rodlG lying upon rod 15, the leg. can be bent-down around rod 16 and preferably reach to the form board 17, or perhaps enter it slightly, although this is not absolutely essential. v

The standard 12 maybe either substantially at right angles to stop 11, as shown in Fig. 2, or may be at an angle thereto, as shown in Fig. 3.- It is a little more con- Specification of Letters ljatent. Patented- June race. i91e. Serial No. 306.857;

venient, as will appear, to have the standard 12.substantially at right angles to stop 11 and to then bend the standard to one side or the other, if desired, after the ch'air 'has'.been I driven to place in the form.'

In operation, the chair isreadily driven, I

like a. nail, into'place at, the desired position relative to the-form and reinforcing rods 15 placed in the seats thereof, said seats above the forms so that they will be thorsupported at that particular point, a portion of the length of the inverted leg 14 may, if desired, be clipped off and the leg then. bent around the bar 15, as shown in Flg. 3, being holding them secure'iy' against displacement, notv only laterally but also at a proper height- 7 oughly embedded in the concrete. If only a single series of reinforcing rods is to be preferably turned around and down. far

' enough to brin'g its .end either. against, or

sligl1tly"into,-the form 17, so as to thus form a foot which will prevent downward disw placement of the rod during that period of,

erection when workmen are necessarily tramping over the rods preliminary to, duringthe pouring of the concrete. If a second series of rods 16 isto' be placed,

they are laid upon and transversely of, the v rods 15 and against the upper ends of standards 12, as well as against the U-shaped seats and 13. The inverted legs 14 are then bent down around rod 16 and the end preferably brought against, or slightly into, the form 17, as illustrated in Fig. 2,- thus bracing the rods and chair against downward displacement.

.I have found in practice that the chair can put in. place by comparatively unskilled labor; and that it firmly retains the reinforcing rods in proper place. I claim as my invention:

be produced very cheaply; that it is readily 1.- As an article of manufacture, a chair for reinforcing rods, consisting of a single piece of wire bent to form an entry tip 10, a stop portion 11, a standard 12, a U-shaped seat 13, and an inverted leg 14, substantially as described. A 2. As an article of manufacture,a chair for reinforcing rods, comprising an.entry tip, a U-shaped seat, having a depth greater than the rod to besupportd, and a flexible upper portion normally arranged to leave the seat free of eccess and adapted to be bent downwardly and around a rod lying transversely to the seat, I

3. As an article of manufacture, a chair 5 for reinforcing rods, comprising an entry tip, a U-shaped seat, and 2t flexible upper portion norma 11y arranged to leave the seat free of access and adapted to be bent down wardly and around a rod lying transversely to the seat. 10 In witness whereof I have'here'unte set my hand at Chicago, lllinois. l

WILLIAM B) LEONARD. 

